I got this product to use as an etching and primer for a trailer that I was going to build. I had a used frame and two axles that I had that had a lot of rust on it. I wire brushed the frame then sprayed Rust Kutter all over the frame. The project never got beyond this point. That was five years ago, the frame was out side all this time and did not start to rust.I think that is a good testament as to how well this product works.

This didn't work as expected. Used on a tractor and tractor implements. Scuffed the loose rust off and applied as directed. Understanding that it could take days to dry/convert. I waited, and waited, and waited days ( tractor, rims, fenders, and implements where treated in a heated insulated garage thats is kept at a constant 70°). Product seemed and felt dry so I washed it off as directed. I honestly didnt see much change to the metal, dried everything off with forced air and let it sit for a day to be certain it was completely dry before shooting the metal with primer. The following day or so I saw light surface rust in SOME places that had been treated. For me the amount of down time waiting coupled with questionable results just dont make it a worth while purchase. I did go over everything with another product that converted the surface rust into a black printable surface within 15 minutes then I primed immediately after.